Drive-wheel-locking device



7 J. ROSS DRIVE WHEEL LOCKING DEVICE Feb, 27, was.

Original Filed Mar. 14, 1921 2 sheets-sheet l Web 27, 1923, 1,446,484

DRIVE WHEEL LOCKING DEVICE Original Filed Mar. 14, 1921 2 sheets-sheet 2Iva/8722507 WTz'fngga Jmzefi 180,5

JIEVTES ROSS, 0F LAPOR'IE, INDIANi-i., ASSIGNOR TO ADVANGE-RUTMELYCOIVIPANY, OF

LAPORIE, EINDIANA, A GOEPURATION OF INDIANA.

DREVE-TNHEEL-LOOKING DEVICE.

To all. whom it may concern:

Be it known tha .oss. a citizen of the United States. at Laporte, in thecounty oif Laportc and State ct indiana, have invented a certain new anduseiul Improvement in l lrive-lVheel-lcoking Devices. of which thefollowing is a speciitication.

This application my application No. 452.067. tiled March 1%, willrelates to means for locking the ditterential in the transmission of anauto niotive vehicle. ."is is well known such vehicles are commonlyprovi'zled with (liiifei cntial gearing whereby the speed oi rotation oithe driving wheels may be diilered. ll l on. one of the (hiring wheelsof the auto motive vehicle is in contact with the good driving surface,as example, a roach and the other wheel is in contact with a bad drivingsurface, for example. a mud hole, it is common experience that the wheelon the road will not revolve whereas the wheel in the mud hole, whenpower is applied, will revolve rapidly without performing any 01?-tective work. It is one of the objects of the present invention toprovide a means which will prevent this action so that at the will oithe operator the differential may be locked and the two driving wheelswill 1'6 volve in unison and at the same speril. Another object of theinvention is to pro ride in such a lock an automatic means for throwingit out of operation. As soon as the pressure is applied through thegearing member each drivingwheel becomes sub stan'tially even. Thus soonas the ve hicle has gotten out of the mud hole each of the wheels isexerting; the same directive eiiect so that there is no tendency for onewheel to move at a different speed from the other. The differential lockwill automati cally be thrown out oi operation.

The invention is illustrated more or less diagrammatically in theaccompanying drawings wherein Figure 1 is a section through that part ofwhich is a division of the driving mechanism to which the lock {isapplied;

Figure 2 is similar view of a slightly modified form.

Like parts are designated by like charactors throughout. A is housingwithin which the driving and differential gearing is located. B B arestub shafts each carrying at its outer end a driving wheel and at itsinner end a master gear B. Mounted in the bearings C within the housingA a stub shaft C which has pinned upon it a pinion D which meshes withthe right hand master gear 3. Mounted for rotation upon the shaft C is apinion E. This pinion normally idles with the left hand master gear B.Each of the pinions D and E is provided along its inner end withtoothedv portions D. E. The pinion E is provided with an annular dopression E About the inner end ot the pinion E is located a yoke E, theinner ends of which penetrate within the annular groove E The yoke E ispivotally mounted on the casing A at E and is adapted to be movedlaterally by means of the handle E Bymeans of the movement of thishandle the pinion E can be moved laterally so that the toothed portionson its inner end engage with that on the inner end of the pinion E. Whenthis takes place the two pinions are locked together and rela tiverotational movement of them is impossible. They revolve together and atthe same speed, thus locking the two master gears against relativemoven'aent and the driving mechanism is thus also looked so that the twodriving wheels must revolve together and at the same speed. and slippingof either is prevented.

In the modified form shown in Figure 2 the two pinions D and E are againprovided. The pinion D is fixed to the shaft C and the pinion .l] isfree to rotate upon it. Each 01" these pinions is constantly andcompletely in mesh with its respective master gear. The shatt C has uponit the feather C. Upon the shaft C and engaging the feather C is mounteda. aw clutch F which is normally in the position shown in full lines inFigure 2. The clutch member l? is provided with the annular groove F,and about this clutch member is located the yoke E the ends of whichpenetrate within the annular portion F. The yoke is pivoted on thecasing A at E and is adapted to be manipulated by the handle E When itis desired to lock the two pinions together, the clutch member F ismanipulated by means of the handle F and is moved laterally so as tomesh with the pinion When. this takes place the two Serial No. 452,067;Iiividecl and this application filed January Serial No. 529,588.

The use and operation of my invention are.

as follows:

In each form of the device the operation is the same. The master gear isprovided on eachoftvvo stub shafts an d a driving con- -nection isprovided between the two master gears. This connection is normally outof operation, but is adapted at the Will oi the operator t-o'be put inoperation, so that the speed of the two master gears becomes the sameand relative movement is prevented, and thus slipping of the wheelsbecomes impossible.

I claim:

1. In a transmission a plurality of independently mounted driven gearsand means for causing them to rotate in unison at the same speed, saidmeans con'zprising a rotary shaft having one pinion fixed upon it andanother pinion, independently mounted upon it for rotation. each of saidpinions in mesh with one of said gears and means for interlocking saidpinions.

2. In a'transmission a plurality of independently mounted driven gearsand means .pendently driven gears and means for for causing them torotate in unison at the same speed, said means comprisinga rotary shafthaving one pinion fixed upon it and another pinion independently mountedupon it for rotation, each of said pinions in mesh with one of saidgears, and a clutch upon said shait adapted to-look said pinions toprevent their relative movement.

' In a transmission a plnra'lityotindecans 111g them to rotate in unisonat the same speed, said means comprising a driven'shaft having a pinionfixed upon it and another pinion independently mounted upon it forrotation, each at said pinions being in mesh With one of said drivengears, one of said:

plnions laterally movable to engage the other.

i. in a transmission a plurality of independently driven gears and meansfor causing them to rotate in unison at the same speed. said meanscomprising a driven shaft having a pinion fixed upon it and anotherpinion independently mounted upon it for rotation. each. of: saidpinions being in mesh with one of said driven. gears one of said pinionslaterally movable to engage the other and each of said pinions beingprovided inits inner end with teeth adapted to interlock When themovable pinion is moved laterally.

Signed at Laporte, county of Laporte and State of Indiana, this 11 dayof January, 1922.

JAMES, Ross.

